What are useful and harmful effects of viruses?

Answer 1

viruses can replicate fastly compared to an other cells their ability to replicate using other cell's host shows their ability to destroy the host.moreover they dis integrate the host cell dna to an extent were the host dna is never recognised.it take over the operational functions of the host cell by synthesising their own proteins.they begain to multply in expense of the host cell.thus how the host cells are destroyed and new virus phages are synthesised living the host to suffer

Answer 2

population control, Natural selection, genetic diversity... The question is not what are the benefits of viruses in humans, rather, who are you? A Darwinist or a Sadist, and the "i dunno, but God has a plan for us" answer is for the unenlightened.

[additional note by D. Sprague] From the viewpoint of bio ecosystems, a virus is purely a parasite, or purely destructive. It destroys cells, plant and animal, simply to replicate itself (RNA, ribonucleic acid, or DNA, deoxyribonucleic acid), and repeats the cycle as long as it can find a host cell. In comparison, bacteria are vital to the general bio ecosystem for many reasons; one predominate reason is the service they provide as an enteric organism for digestion and absorption of nutrition. Mammals and bacteria have a symbiotic relationship. Viruses have been regarded as a "renegade" RNA or DNA. If they are purely parasitic to living organisms, why do they exist? It has been suggested that out from the 3.4 billion year lifeform evolution timeline, individual RNA or DNA "leaked out" and sustained itself with a variant that encapsulated itself, and has been dining on host cells ever since. Another speculation is that viruses are the original lifeform, and that all life has evolved from simple encapsulated RNA and DNA, and have been sustaining themselves through their descendants ever since. If one measures dominance by evolutionary duration, the virus can be regarded as the most dominant life form. Being about 200 times larger than a Helium atom and nearly 2 billion times smaller than the average size of a human body, it replicates the fastest and therefore can mutate the fastest. Population control, genetic diversity, and natural selection...indeed: is a biochemically complex Human the most dominant lifeform, or a simple virus?

Answer 3

Many viruses are used in biological research related to genetic and biotechnology.....

Viruses can be used as a vector....

Viruses can be used to kill harmful organisms....

Many enzymes are obtained from viruses....

A number of vaccines are obtained from viruses....

IQRA ADALAT

Answer 4

nothing